Step support



FIG. 1 is a perspective view of the step support, showing my new design; and

FIG. 2 is a front elevational view, the rear being identical thereto;

FIG. 3 is an enlarged inverted view of one of the projections;

FIG. 4 is a top plan view;

FIG. 5 is a side elevational view, the opposite side being identical thereto; and,

FIG. 6 is a bottom plan view thereof.

The broken lines illustrating steps are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a "step support", as shown and described. 